帮我改下错
#include <stdio.h>int main()
{
int year,month,day;
scanf("%d%d",&year,&month);
if(month==1||month==3||month==5||month==7||month==8||month==10||month==12)
day=31;
if(month==4||month==6||month==9||month==11)
day=30;
if(month==2&(year%400=0||(year%4==0&year%100!=0)))
day=29;
else day=28;
printf("%d",day);
return 0;
}
求解 为什么错了